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//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/locale/generator.hpp>
#if defined(__FreeBSD__)
# include <xlocale.h>
#endif
#include "../shared/mo_hash.hpp"
#include "all_generator.hpp"
#include <clocale>
#include <cstring>
#include <ios>
#include <locale>
#include <stdexcept>
#include <string>
#include <vector>
#include <wchar.h>
namespace boost { namespace locale { namespace impl_posix {
template<typename CharType>
struct coll_traits;
template<>
struct coll_traits<char> {
static size_t xfrm(char* out, const char* in, size_t n, locale_t l) { return strxfrm_l(out, in, n, l); }
static size_t coll(const char* left, const char* right, locale_t l) { return strcoll_l(left, right, l); }
};
template<>
struct coll_traits<wchar_t> {
static size_t xfrm(wchar_t* out, const wchar_t* in, size_t n, locale_t l) { return wcsxfrm_l(out, in, n, l); }
static size_t coll(const wchar_t* left, const wchar_t* right, locale_t l) { return wcscoll_l(left, right, l); }
};
template<typename CharType>
class collator : public std::collate<CharType> {
public:
typedef std::basic_string<CharType> string_type;
collator(std::shared_ptr<locale_t> l, size_t refs = 0) : std::collate<CharType>(refs), lc_(std::move(l)) {}
int do_compare(const CharType* lb, const CharType* le, const CharType* rb, const CharType* re) const override
{
string_type left(lb, le - lb);
string_type right(rb, re - rb);
int res = coll_traits<CharType>::coll(left.c_str(), right.c_str(), *lc_);
if(res < 0)
return -1;
if(res > 0)
return 1;
return 0;
}
long do_hash(const CharType* b, const CharType* e) const override
{
string_type s(do_transform(b, e));
const char* begin = reinterpret_cast<const char*>(s.c_str());
const char* end = begin + s.size() * sizeof(CharType);
return gnu_gettext::pj_winberger_hash_function(begin, end);
}
string_type do_transform(const CharType* b, const CharType* e) const override
{
string_type s(b, e - b);
std::vector<CharType> buf((e - b) * 2 + 1);
size_t n = coll_traits<CharType>::xfrm(buf.data(), s.c_str(), buf.size(), *lc_);
if(n > buf.size()) {
buf.resize(n);
coll_traits<CharType>::xfrm(buf.data(), s.c_str(), n, *lc_);
}
return string_type(buf.data(), n);
}
private:
std::shared_ptr<locale_t> lc_;
};
std::locale create_collate(const std::locale& in, std::shared_ptr<locale_t> lc, char_facet_t type)
{
switch(type) {
case char_facet_t::nochar: break;
case char_facet_t::char_f: return std::locale(in, new collator<char>(std::move(lc)));
case char_facet_t::wchar_f: return std::locale(in, new collator<wchar_t>(std::move(lc)));
#ifdef __cpp_char8_t
case char_facet_t::char8_f: break; // std-facet not available (yet)
#endif
#ifdef BOOST_LOCALE_ENABLE_CHAR16_T
case char_facet_t::char16_f: return std::locale(in, new collator<char16_t>(std::move(lc)));
#endif
#ifdef BOOST_LOCALE_ENABLE_CHAR32_T
case char_facet_t::char32_f: return std::locale(in, new collator<char32_t>(std::move(lc)));
#endif
}
return in;
}
}}} // namespace boost::locale::impl_posix
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